Maverick learns that his father died a hero in a dogfight, he learns to move on from his guilt over Goose’s death in their jet wash, and he lets go of his ego enough to settle down with Charlie in Miramar, California and become a Top Gun instructor.
When viewed in its entirety, Top Gun revolves heavily around the theme of closure.
Maverick spends the entire movie puzzling over what happened to his father (a fellow aviator) during a battle in the Vietnam War.
It’s an effective, character-driven arc, and all comes to a close by the time the film’s credits roll.